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unload first 10 rows only

 
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yadav2005
Intermediate


Joined: 10 Jan 2005
Posts: 348
Topics: 144
PostPosted: Mon Aug 27, 2007 2:01 pm    Post subject: unload first 10 rows only Reply with quote
Members,

I am trying to unload records from a DB2 table using a query in JCL by executing Unload utility , but i am getting many records , however i want to restrict the unload to only first 10 rows only , can somebody help me with the query ?

one option would be to unload and then run a sort step to copy first 10 records using different ways but i would like to have it done by a sql query.
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kolusu
Site Admin
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Joined: 26 Nov 2002
Posts: 12378
Topics: 75
Location: San Jose
PostPosted: Mon Aug 27, 2007 2:13 pm    Post subject: Reply with quote
yadav2005,

If your shop has DB2 version 7 and higher then you can use the FETCH FIRST N rows clause like shown below


Code:

 SELECT *
   FROM TABLE
  FETCH FIRST 10 ROWS ONLY;


Check this link for a detailed explanation of the clause

http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DSNSQJ12/4.4.3

Hope this helps...

Cheers

Kolusu
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yadav2005
Intermediate


Joined: 10 Jan 2005
Posts: 348
Topics: 144
PostPosted: Mon Aug 27, 2007 2:26 pm    Post subject: Reply with quote
Thanks Kolusu for your needful help it works .But i would like to have a WHERE condition included also in the query , if that is the case how should i use.

For example:
Code:

SELECT *
   FROM TABLE
  FETCH FIRST 10 ROWS ONLY;

Now i want to include a condition where EMPAGE = 24 , how can i do that as i want to retreive first 10 employees whose EMPGAE = 24 years.
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yadav2005
Intermediate


Joined: 10 Jan 2005
Posts: 348
Topics: 144
PostPosted: Mon Aug 27, 2007 2:27 pm    Post subject: Reply with quote
Kolusu,

I got the solution by trying:
Code:

SELECT *
   FROM TABLE
  WHERE EMPAGE = 24
  FETCH FIRST 10 ROWS ONLY;
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